So I'm finally going to pull the trigger and buy a 30D. Has anyone purchased from any of the websites below? I was doing a search and all of them came from shopcartusa.com. They're stuff is priced a lot lower than everyone else. A couple seem legit but I don't want to screw myself to save $$. Thanks in advance!

Stick to someone who is selling the camera for the regular price. If there is a place that is selling camera equipment for significantly cheaper than what you'll find at Costco or B&H (as noted by Walt) then the company is probably shady as F*ck.

Much of my camera equipment has come from Costco, for my camera body, BHphotoandvideo, Amazon, Andorama, and other authorized retailers of different types that carry excellent ratings.

Even though Costco no longer offers a lifetime warranty, they are a great place to purchase product. Do the math, since it includes some media cards also. Decide if the kit lens is something you would use.